diff --git a/config.json b/config.json
index 86c3fc85cca6..2a6fb5df3dbf 100644
--- a/config.json
+++ b/config.json
@@ -1,6 +1,6 @@
 {
  "base_template": "lib/website/templates/base.html", 
- "framework_version": "3.9.6", 
+ "framework_version": "3.9.7", 
  "modules": {
   "Calendar": {
    "color": "#2980b9", 
diff --git a/public/js/wn/views/grid_report.js b/public/js/wn/views/grid_report.js
index b7a098daba1b..f67373f35e5d 100644
--- a/public/js/wn/views/grid_report.js
+++ b/public/js/wn/views/grid_report.js
@@ -587,6 +587,7 @@ wn.views.GridReport = Class.extend({
 		var date_diff = dateutil.get_diff(this.to_date, this.from_date);
 			
 		me.column_map = {};
+		me.last_date = null;
 		
 		var add_column = function(date) {
 			me.columns.push({